Cooking oven



FIG. 1 is a front, left perspective view of a cooking oven in accordance with our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 2, with internal mechanisms omitted;

FIG. 9 is a sectional view taken along line 9-9 in FIG. 2, with internal mechanisms omitted; and,

FIG. 10 is a front, right perspective view showing thereof showing an open oven door. 

CLAIM The ornamental design for a cooking oven, as shown and described. 